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The Boolean (bool) Data Type

The Boolean (bool) Data Type#

TODO

Up until this point, two data types have been presented. These data types are reviewed below:

Reviewing Data Types#

TODO

Strings#

A string is a data type used for a character or a sequence of characters. Strings are characters between quotes ' ' or double quotes " ". TODO

Integers#

TODO

The Boolean Data Type#

TODO

About?#

TODO

Brief Introduction to Logic#

TODO

Logical Operators#

TODO

Logical Operator

$\land$

AND

TODO

$\lor$

OR

TODO

TODO

Negation Operator

$\neg$

Negation#

TODO

Venn Diagram#

TODO

venn-logic

TODO

Truth Tables#

TODO

$p$

$q$

$p\land q$

$p\lor q$

T

T

T

T

T

F

F

T

F

T

F

T

F

F

F

F

TODO

$p$

$q$

$\neg p$

$\neg q$

T

T

F

F

T

F

F

T

F

T

T

F

F

F

T

T

Boolean Operators in Python#

The int Values of the bool Data Type#

Note

, True and False, with the corresponding integer values 1 and 0,Given that that the Boolean data type has two values True and False with the corresponding integer values 1 and 0 respectively. It is possible to turn an LED on and off using a bool as demonstrated below:

# Imports go at the top
from microbit import *

# Set the LED pin
led_pin = pin1

# Code in a 'while True:' loop repeats forever
while True:
    # Turn the LED on
    led_pin.write_digital(1)
    # Wait for 500ms (0.5 seconds)
    sleep(500)
    # Turn the LED off
    led_pin.write_digital(0)
    # Wait for 500ms (0.5 seconds)
    sleep(500)

Is equivalent to:

# Imports go at the top
from microbit import *

# Set the LED pin
led_pin = pin1

# Code in a 'while True:' loop repeats forever
while True:
    # Turn the LED on
    led_pin.write_digital(True)
    # Wait for 500ms (0.5 seconds)
    sleep(500)
    # Turn the LED off
    led_pin.write_digital(False)
    # Wait for 500ms (0.5 seconds)
    sleep(500)

Is equivalent to:

# Imports go at the top
from microbit import *

# Set the LED pin
led_pin = pin1
# Set the LED to on
led_on = True
# Set the LED to off
led_off = False

# Code in a 'while True:' loop repeats forever
while True:
    # Turn the LED on
    led_pin.write_digital(led_on)
    # Wait for 500ms (0.5 seconds)
    sleep(500)
    # Turn the LED off
    led_pin.write_digital(led_off)
    # Wait for 500ms (0.5 seconds)
    sleep(500)

# Imports go at the top
from microbit import *

# Set the LED pin
led_pin = pin1

# Code in a 'while True:' loop repeats forever
while True:
    # Turn the LED on
    led_pin.write_digital(True)
    # Wait for 500ms (0.5 seconds)
    sleep(500)
    # Turn the LED off
    led_pin.write_digital(False)
    # Wait for 500ms (0.5 seconds)
    sleep(500)
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